and republican presidential debates in new hampshire. they ran into each other at a labor day parade in 2007. these are just two of the three times men have seen each other in person. flash forward to 2012. romney briefly stopped for lunch. >> people want to know who's going to win, who is going to score the punches. >> reporter: president obama spent the day near las vegas where his rehearsal with senator john kerry. >> they're keeping me indoors all the time. it's a drag. they're making me do my homework. >> reporter: at a rally in denver, romney seemed to down play reports his campaign has prepped him with zingers. >> it's not so much winning and losing or even the people themselves, the president and myself, it's about something bigger than that. it'll be a conversation with the american people that will span almost answer month. >> reporter: romney has softened his position on immigration. he will honor the president's recent stopgap measure allowing the children of illegal workers to stay in the country until immigration reform is